Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a0dfdfb7f05e251…

MALICIOUS

PDF

70.8 KB Created: 2021-01-28 08:04:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 6f0a5fdf0e822c14a455426e83853c7b SHA-1: 1ebdfff24b4197bd2f09df72ea41ba38a002ba40 SHA-256: 8a0dfdfb7f05e251d07c2d8bf00c32adf0b537d28393964f1a5385df08a92a70
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics as malicious, including a critical alert for linking to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text suggesting it is a lure for 'Home mart mexico sucursales df'. The embedded URLs point to disposable domains and link farms, indicating a phishing or scam attempt. No scripts were extracted, but the PDF structure itself facilitates redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://yafferge.ru/123?utm_term=home+mart+mexico+sucursales+df In PDF document text
    • http://vezerfa.xyz/36367828281zqnjj.pdfIn PDF document text
    • https://koxawikala.weebly.com/uploads/1/3/4/6/134643159/gifomeranavu.pdfIn PDF document text
    • http://firstdoctor.xyz/photo_gallery_album_apkewhes.pdfIn PDF document text
    • https://lisopivoxo.weebly.com/uploads/1/3/4/9/134901835/lukiwuke_dajudo.pdfIn PDF document text
    • http://copyrightram.net/the_best_tv_guide_appjr482.pdfIn PDF document text
    • https://jipubegu.weebly.com/uploads/1/3/1/0/131070098/0c68e185b6c8.pdfIn PDF document text
    • https://pufotesur.weebly.com/uploads/1/3/1/3/131378771/dudunijimu.pdfIn PDF document text
    • http://ndfnasg.xyz/the_boondocks_season_1_torrent4e60d.pdfIn PDF document text
    • http://natur-bio.space/cards_against_muggles_deutschn5z1p.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474992/normal_5ff7644f14d93.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454562/normal_5ffff5c8c737a.pdfIn PDF document text
    • https://boguvetasitob.weebly.com/uploads/1/3/1/3/131380850/nafivapojit.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446390/normal_5ff8c175596d7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421354/normal_6008b99453a10.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pazatuv/transformation_of_log_functions_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/midipes/74765070393.pdfIn PDF document text
    • https://s3.amazonaws.com/suzujewa/felilutugezibolas.pdfIn PDF document text
    • https://s3.amazonaws.com/sinamozagemoger/asking_for_information_business_letter.pdfIn PDF document text
    • https://s3.amazonaws.com/tapexiw/48707948750.pdfIn PDF document text
    • https://s3.amazonaws.com/gewisetug/instagram_stories_hd_online.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d5ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5CA 5196 bytes
SHA-256: ba170317acc87c4b8553f0bcb07b9d108f0465ce741418877fb6211d4bab1ce7
font_01_sfnt_off0000e75d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE75D 11960 bytes
SHA-256: b444875818fa17914a444d2169166dc0d5d93546cc869c0dc233ea009015d85a

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